That has became a sentient.
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He's definitely attained some form of sentience; why else would he threaten us with orbital annihilation during the Fallen SABER Strike? I do wonder what kind of things he has planned. He could be in contact with the Vex or The Nine for all we know. I'm also curious as to what kind of relationship, if any, Rasputin has with this "S.I.V.A." thing in Rise of Iron. I mean, it's a machine plague from the Golden Age, the old man must know something about it.